SnakeMatrix1

int snakeLength = 3;
SnakeValues[snakelength*2];
// buttons to change direction of snake
int btnx1 = 2;
int btnx0 = 3;
int btny1 = 4;
int btny0 = 5;
xl = 8;
yl = 8;

// These values are used to check which direction we are moving in.
int x1 = 1;
int x0 = 0;
int y1 = 1;
int y0 = 0;




void movement(){
    // Arrayet skubber alle værdier en plads ned
    for (int i = snakeLength*2;i>0;i--){
        snakeValues[i] = snakeValues[i+2];
        snakeValues[i+1] = snakeValues[i+3];

    }
    snakeValues[0] = topPosX;
    snakeValues[1] = topPosY;

}

void printscr(){
    for (int i = snakeLength*2;i > 0;i-2){
        println(i);
        println(i+1);
    }
}

// changeDir checks which button is pressed down and makes the topPos equal to the direction of the button
void changeDir(){
    // reset the directions
    x1 = 0;
    x0 = 0;
    y1 = 0;
    y0 = 0;
    //check which button is pressed down

    if(digitalRead(btnx1)==!HIGH){
    topPosX = topPosX + 1;
    x1 = 1;
    }
    if(digitalRead(btnx0)==!HIGH){
    topPosX = topPosX - 1;
    x0 = 1;
    }
    if(digitalRead(btny1)==!HIGH){
    topPosY = topPosY + 1;
    y1 = 1;
    }
    if(digitalRead(btny0)==!HIGH){
    topPosY = topPosY - 1;
    y0 = 1;
    }
}

void noPress(){
    switch(){
    case x1 == 1:
        topPosX = topPosX + 1;
        break;
    case x0 == 1:
        topPosX = topPosX - 1;
        break;
    case y1 == 1:
        topPosY = topPosY + 1;
        break;
    case y0 == 1:
        topPosY = topPosY - 1;
        break;
    }
}
void loop(){
    printscr();
    if(digitalRead(btnx1)==!HIGH || digitalRead(btnx0)==!HIGH ||digitalRead(btny1)==!HIGH||digitalRead(btny0)==!HIGH){
    changeDir();
    }
    else{
    // noPress makes sure to keep the snake moving, even when no button is pressed.
    noPress();
    }
    movement();
    delay(500);
}




Alle gamle værdier er i arrayet, vi skal derfor fjerne den sidste gamle værdi, rykke alle andre værdier en ned i arrayet og derefter smide den nye værdi på den øverste plads